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They are gels for coloring the flash. Used for creative effect or to color match the ambient lighting.
CTO (color temp orange) is for matching the flash to incandescent lights or sunrise/sunset.
CTB (blue) is for matching with cooler sources (cool LED's, shade, etc)... it was originally intended to shift tungsten sources to daylight so it's not used for ...
3
It should revert to the plus sign after about 3 seconds...
It is telling you that the flash does not have near enough power to provide enough light, by at least 3 stops (it will report underexposure as -0.3EV to -3.0EV).
You should zoom the flash head to max/120mm, but I doubt that will help enough.
3
Those are coloured filters to put in front of the flash, simply to change the colour of the light. There is really not much more to it. In the film days, it could however make sense to e.g. use a yellow filter on the flash if you used colour film balanced for tungsten or indoor lighting. Flashes have colour temperatures similar to daylight and if using a ...
1
You need to set you exposure compensation on the Godox XPro. When you take the shot, the XPro is going to send a signal to the receiver/flash which will set it to whatever settings it has configured.
It will override anything set on the flash, the XPro is the controller.
1
In addition to coloring the light of the flash to match ambient lighting, the other fun colors (or colors created by combining gels) can be used to create all sorts of interesting effects. For instance, flashes are often used not as primary light for a photo, but as effect light or other secondary purposes.
Jeff Carpenter illustrates this in his Petapixel ...
1
No, on this particular lens. The ring flash would use the filter thread which is positioned around the front lens. The ring flash would add weight on the tip of the lens.
Since the lens is a small motorized zoom lens, I would not trust it to support a ring flash. The motor and zooming mechanism risks premature breakage, even if not activated during the use ...
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